Printing member



Patented Dec. 31, 1.935

. UNITED STATE-s .PATENT OFFICE Pam'rmc. MEMBER v Stanley A. Danser,Rochester, N. Y., assign'or, by mesne assignments, to Vivian M.Stacy-Bush,

Rochester, N. Y.

Application August 5, 1930, Serial No. 473,199

' Renewed November 14, 1935 ociaims. (01.101-379) This invention relatesto printing members and a process of making the same, and has for anobject the provision of an improved printing member, and of an improvedprocess of making such printing members. In the drawing accompanyingthis specication and forming a part of this application I have shown,for purposes of canizablerubber comprising a plurality of thicknesses,plied up on a calendar, in a well known manner, and of suitablecomposition so that when vulcanized or cured under proper heat andpressure, the resulting product will be relatively dense and hard,though slightly elastic, to form a base adapted to be supported directlyupon the platen of the press, and of such thickness as to support theprinting surface of the printing element B in type-high relation. Theprinting element B also comprises a plurality of rubber layers; plied upon a calendar,

but of such compositionthat when vulcanized or cured under proper heatand pressure, similar to that applied ln connection'with the base.A

A, the resulting product will be relatively softer and more elastic thanthe base A, but still of4k suilicient hardness and body as to provide a-glossy smooth printing surface adaptable for engraving or etching, andwhich will retain its form without deformation under printing pressures.As shown, a design C is engraved thereon, and provides an intaglioprinting surface, though of course it will be understood that theprinting surface may also be in relief or of the planographic type. Thebase A and the printing element, B are united by vulcanizing the sametogether, the uniting being eiected during the simultaneous curing ofthe base A and printing element B.

The printing member thus provided, embodies the relatively hard thoughslightly elastic base Awhich supports the printing element B directlyfrom the platen of the press, and in type-high relation, while theprinting element B, though of suillcient elasticity to yield toinequalities in the matter printed, nevertheless is of such hardness asto provide a smooth surface in which the design may be engraved oretched, and which resists deformation ofthe design during the printingoperation.

vThe printing member is particularly well adapted for printing in watercolor ink, though equally well adapted for printing in oil, carbon, orother inks. 1

In producing the'printing member, a plurality of layers of rubber of thedesired character to produce the base A are plied up on a calendar,

and a plurality of layers of rubber of a diiferent character to producethe printing element B, are also plied up on a calendar. The printingelement B is then laid upon the base portion A, and the two full-moldedin a mold I0, provided with a movable element Il bearing upon a steelplate I2, havingv a face of great smoothness adapted to engage the upperoutside surface of the printing element B. Heat and pressure are thenapplied to he mold in a well known manner, resulting in the simultaneousvulcanizfation' of the base portionjA and printing element B todiiferent degrees of consistency, and uniting the same, and by reason ofthe presence of the smooth surfaced plate' l2,- a correspondingly smoothsurface is imparted to the printing element B. After removal from themold the printing member is buied or sanded to obtain the exact sizerequired so that the printing surface of the printing element B will bein type-high relation when the printing member is placed in the press.

It will be apparent to those skilled in the art lthat I haveaccomplished at least the principal object of my invention; it will alsobe apparent to those skilled in the art that the embodiments hereindescribed may be variously changed and modified without departing fromthe spirit of the invention; and it will further be'apparent that theinvention is capable Vof uses and has advantages not herein specificallydescribed; hence it will be appreciated that such embodiments areillustrative only, and that my invention is not A limited thereto.

I claim:

1. A printing plate, adapted for use in a printing press, comprising: avsupporting base, of substantially uniform thickness; and a printingface, of a rubber composition, carried by said base; said base being ofa rubber composition, relatively harder, at least semi-hard, andsubstantially rigid, itself xedly supporting said face.

2. A printing-press printing plate, comprising: a supporting base ofsubstantially uniform thickness; and a printing face, of a rubbercomposition, constituted for engraving, and carried by said base; saidbase being of a rubber composition, at least semi-hard, andsubstantially rigid,

itself xedly supporting said face.

3.A printing plate, adapted for use in a printing press, comprising: asupporting base, of substantially uniform thickness; and a printingface, of a rubber composition, constituted for engraving, and can'ied bysaid base; said base being of a rubber composition, a't least semi-hard,and substantially rigid, itself iixedly supporting said face; and saidface .being permanently intercalated to said base.

4. A printing plate, adapted for use in a printing press, comprising: asupporting base; and a printing face, of a rubber composition,constituted forengraving, and carried by said base;

said base being of a rubber composition, at least semi-hard, andsubstantially rigid, itself flxedly supporting said face; and said facebeing permanently intercalated to said base.

5. A printing-press printing plate, comprising: a supporting base; and aprinting face, carried by said base; said base being of a rubbercomposition, suitable to constitute a support, and said face being of arubber composition, constituted for engraving; and said face beingpermanently intercalated to said base.

6. A printing-press printing plate, comprising: a supporting base;` anda printing face, carried by said base; said base being of a rubbercomposition, relatively hard, and said face being of a 'rubbercomposition, relatively soft; and said 5 face being permanentlyintercalated to said base.

7. A type-high printing-press printing plate, comprising: a printingface, of relatively soft rubber; and a supporting base for said face, ofrelatively hard rubber, solidly supporting said 10 face, and of apredetermined substantially uniform thickness whereby vsaid plate isstandard printing-press type-high. i

8. A type-high printing-press printing plate, comprising: a printingface, of a rubber compo- 15 sition, constituted `for engraving, andsuitable for printing; and a supporting base for said face, of adiierent rubber composition, substantially rigid, suitable for asupport, solidly 'supporting said face, and of a predeterminedsubstantially 20 uniform thickness whereby said plate is standardprinting-press type-high.

9. A type-high printing-press printing plate, comprising: a printingface, of relatively soft rubber; anda supporting base for said'sface, of25 relatively hard rubber, of a predetermined substantially uniformthickness whereby said plate is standard printing-press type-high, andto which said face is permanently intercalated.

30 'STANLEY A. DANSER..y

